Question

Is it possible?

It means i hope to create the widget to paste it at different pages on a site(or even in the master mage) to give users ability to quick login. Is it possible or all pages when login accessable have to be enumerated like this:

<authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn" timeout="2880" />
</authentication>

Answer 1

As long as the page allows anonymous access, I don’t see why this would be a problem. Just put a username/password field on the page and use the API to log them in:

if (Membership.ValidateUser(username, password))
{
    FormsAuthentication.SetAuthCookie(username, true / false);
}

EDIT: You probably want to SSL any page with a password field on it.